Highly electroactive frozen-state polymerized polypyrrole nanostructures for flexible supercapacitors

0576718 - ÚMCH 2024 RIV CH eng J - Journal Article
Tumacder, Doebner Von - Minisy, Islam M. - Taboubi, Oumayma - Bober, Patrycja
Highly electroactive frozen-state polymerized polypyrrole nanostructures for flexible supercapacitors.
Polymers. Roč. 15, č. 20 (2023), č. článku 4140. E-ISSN 2073-4360
Institutional support: RVO:61389013
Keywords : polypyrrole * frozen-state polymerization * methyl orange
OECD category: Polymer science
Impact factor: 5, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2073-4360/15/20/4140

The polymerization of pyrrole in the frozen state with the presence of organic dyes (methyl orange (MO) and Acid Blue 25 (AB)) has proven to produce polypyrrole (PPy) nanostructures. Herein, we explore the electrochemical properties of PPy prepared under frozen-state conditions (−24 °C) with and without the presence of organic dyes. The electroactivity of PPy prepared with MO and AB significantly increased in all electrolytic media with a capacitance higher than this of the PPy prepared at room temperature. The highest capacitance (1914 F g−1) was obtained for PPy-MO in 0.2 M HCl solution. The impedance spectra of PPy showed a decrease in charge transfer resistance when the dyes were present. This indicates a conductivity increase of PPy. Improved electrochemical stability was observed for PPy, PPy-MO, and PPy-AB prepared at −24 °C, wherein a steady gain of capacitance was maintained during 5000 potential cycling. In addition, a PPy-based supercapacitor device was fabricated to demonstrate the energy storage characteristics of PPy, where it showed good capacitive behavior and stability. Overall, frozen-state polymerized PPy posed an impressive capacitive performance for flexible supercapacitors.
Permanent Link: https://hdl.handle.net/11104/0346715